// 跨域设置
module.exports = function (app) {
    app.all('/api/*', (req, res, next) => {
        res.header('Access-Control-Allow-Origin', '*')
        res.header('Access-Control-Allow-Headers', 'X-Requested-With, mytoken')
        res.header('Access-Control-Allow-Headers', 'X-Requested-With, Authorization')
        res.setHeader('Content-Type', 'application/json;charset=utf-8')
        res.header('Access-Control-Allow-Headers', 'Content-Type,Content-Length, Authorization, Accept,X-Requested-With')
        res.header('Access-Control-Allow-Methods', 'PUT,POST,GET,DELETE,OPTIONS')
        res.header('X-Powered-By', ' 3.2.1')
         /*让options请求快速返回*/ 
        if (req.method == 'OPTIONS') {
             res.sendStatus(200)
        }else {
            next()
        }
    })
}